Evaluation of surface roughness of microhybrid and nanofilled composites after pH-cycling and simulated toothbrushing.

Aim: This study evaluated the surface roughness patterns of two resin-based composite restorative materials, a microhybrid (Filtek Z250, 3M ESPE) and a nanofilled (Filtek Supreme, 3M ESPE), subjected to a regimen that simulated dynamic pH-cycling and toothbrushing.

Methods And Materials: Twelve standardized cylindrical specimens of each resin-based composite material were prepared, finished, and mechanically polished. The experimental units were submitted to a pH-cycling regimen followed by 50,000 toothbrushing cycles, after which the surface roughness was measured using an atomic force microscope (AFM).

Gingival crevicular fluid biochemical markers in periodontal disease: a cross-sectional study.

Objective: To evaluate the levels of interleukin-1b (IL-1b) and alkaline phosphatase (ALP) in gingival crevicular fluid (GCF) and correlate these measurements with clinical characteristics of healthy patients and patients with gingivitis and periodontitis.

Method And Materials: Thirty-six individuals were subdivided into three groups of 12: control, gingivitis, and periodontitis groups. GCF samples were obtained from 2 sites for each patient.

Essential oils in one-stage full-mouth disinfection: double-blind, randomized clinical trial of long-term clinical, microbial and salivary effects.

Aim: This randomized clinical trial evaluated the effects of an essential oils-containing mouthrinse for full-mouth disinfection.

Material And Methods: Fifty patients were assigned to receive full-mouth disinfection with either essential oils or placebo. At baseline, 2 and 6 months of treatment the primary outcomes probing depth (PD), plaque index (PlI) and modified gingival index (MGI) were monitored.